. >> reporter: local police officials have a different story saying she drove into the agent for reasons that are still not clear. >> and literally ran our agent down. the agent actually was impacted, was hit by the vehicle and carried several hundred yards on the hood before fearing for his life. >> reporter: and police say that's when he fired his gun at least five times according to witnesses killing her. the entire incident unnerving this california community. >> yeah, i want justice. yes, whoever shot my wife, that guy, whoever he is, he needs to get shot. yeah, he needs to get justice served. you don't shoot an innocent person. >> reporter: police have gone house to house searching for eyewitnesses as part of this investigation. they are still awaiting an autopsy report. david? >> reena ninan in our washington bureau tonight, reena, thank you. >>> now to that alarming problem overtaking some of america's lakes. we even saw it in washington, d.c., this week at the lincoln memorial where the famous reflecting pool was filled with clumps of green. it is happening all across america ma